package com.dylon.imgOperate;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

public class ImgBase64ToImg {

	public static void main(String[] args) {
		String str = GetImageStr("C:\\Users\\gefan\\Pictures\\Saved Pictures\\cccccc.jpg");
		System.out.println(str);
		GenerateImage(str);
	}
	
	public static String GetImageStr(String imgFile)  
    {//将图片文件转化为字节数组字符串，并对其进行Base64编码处理  
        InputStream in = null;  
        byte[] data = null;  
        //读取图片字节数组  
        try   
        {  
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];  
            in.read(data);  
            in.close();  
        }   
        catch (IOException e)
        {  
            e.printStackTrace();  
        }  
        //对字节数组Base64编码  
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);//返回Base64编码过的字节数组字符串  
    }  
	
	public static boolean GenerateImage(String imgStr)  
    {   //对字节数组字符串进行Base64解码并生成图片  
        if (imgStr == null) //图像数据为空  
            return false;  
        BASE64Decoder decoder = new BASE64Decoder();
        try   
        {  //Base64解码  
            byte[] b = decoder.decodeBuffer(imgStr);  
            for(int i=0;i<b.length;++i)  
            {  
                if(b[i]<0)  
                {//调整异常数据  
                    b[i]+=256;  
                }  
            }  
            //生成jpeg图片  
            String imgFilePath = "C:\\Users\\gefan\\Pictures\\Saved Pictures\\ceshi.jpg";//新生成的图片  
            OutputStream out = new FileOutputStream(imgFilePath);
            BufferedOutputStream bout = new BufferedOutputStream(out);
            bout.write(b);
            bout.flush();  
            out.close();  
            bout.close();
            return true;  
        }   
        catch (Exception e)   
        {  
            return false;  
        }  
    }  
}